-$PostgreSQL: pgsql/contrib/pgstattuple/README.pgstattuple.euc_jp,v 1.8 2006/09/04 03:49:05 momjian Exp $
+$PostgreSQL: pgsql/contrib/pgstattuple/README.pgstattuple.euc_jp,v 1.9 2007/06/07 09:56:25 mha Exp $
pgstattuple README 2002/08/22 ÀаæÃ£É×
avg_leaf_density | 50.27
leaf_fragmentation | 0
- bt_metap
- --------
- bt_metap() ¤Ïbtree¥¤¥ó¥Ç¥Ã¥¯¥¹¤Î¥á¥¿¥Ú¡¼¥¸¤Ë´Ø¤¹¤ë¾ðÊó¤òÊֵѤ·¤Þ¤¹¡§
-
- test=> SELECT * FROM bt_metap('pg_cast_oid_index');
- -[ RECORD 1 ]-----
- magic | 340322
- version | 2
- root | 1
- level | 0
- fastroot | 1
- fastlevel | 0
-
- bt_page_stats
- -------------
- bt_page_stats() ¤Ï¡¢btree¤Îñ°ì¤Î¥Ú¡¼¥¸¤Ë´Ø¤¹¤ë¾ðÊó¤òɽ¼¨¤·¤Þ¤¹¡§
-
- test=> SELECT * FROM bt_page_stats('pg_cast_oid_index', 1);
- -[ RECORD 1 ]-+-----
- blkno | 1
- type | l
- live_items | 256
- dead_items | 0
- avg_item_size | 12
- page_size | 8192
- free_size | 4056
- btpo_prev | 0
- btpo_next | 0
- btpo | 0
- btpo_flags | 3
-
- bt_page_items
- -------------
- bt_page_items() ¤Ï¡¢³Æbtree¥Ú¡¼¥¸¤Î¸ÄÊ̤Υ¢¥¤¥Æ¥à¤Ë´Ø¤¹¤ë¾ðÊó¤òɽ¼¨¤·¤Þ¤¹¡§
-
- test=> SELECT * FROM bt_page_items('pg_cast_oid_index', 1);
- itemoffset | ctid | itemlen | nulls | vars | data
- ------------+---------+---------+-------+------+-------------
- 1 | (0,1) | 12 | f | f | 23 27 00 00
- 2 | (0,2) | 12 | f | f | 24 27 00 00
- 3 | (0,3) | 12 | f | f | 25 27 00 00
- 4 | (0,4) | 12 | f | f | 26 27 00 00
- 5 | (0,5) | 12 | f | f | 27 27 00 00
- 6 | (0,6) | 12 | f | f | 28 27 00 00
- 7 | (0,7) | 12 | f | f | 29 27 00 00
- 8 | (0,8) | 12 | f | f | 2a 27 00 00
-
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